/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.dolphinscheduler.plugin.datasource.presto.param;

import org.apache.dolphinscheduler.common.constants.Constants;
import org.apache.dolphinscheduler.common.constants.DataSourceConstants;
import org.apache.dolphinscheduler.common.utils.JSONUtils;
import org.apache.dolphinscheduler.plugin.datasource.api.datasource.AbstractDataSourceProcessor;
import org.apache.dolphinscheduler.plugin.datasource.api.datasource.BaseDataSourceParamDTO;
import org.apache.dolphinscheduler.plugin.datasource.api.datasource.DataSourceProcessor;
import org.apache.dolphinscheduler.plugin.datasource.api.utils.PasswordUtils;
import org.apache.dolphinscheduler.spi.datasource.BaseConnectionParam;
import org.apache.dolphinscheduler.spi.datasource.ConnectionParam;
import org.apache.dolphinscheduler.spi.enums.DbType;

import org.apache.commons.collections4.MapUtils;
import org.apache.commons.lang3.StringUtils;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import com.google.auto.service.AutoService;

@AutoService(DataSourceProcessor.class)
public class PrestoDataSourceProcessor extends AbstractDataSourceProcessor {

  @Override
  public BaseDataSourceParamDTO castDatasourceParamDTO(String paramJson) {
    return JSONUtils.parseObject(paramJson, PrestoDataSourceParamDTO.class);
  }

  @Override
  public BaseDataSourceParamDTO createDatasourceParamDTO(String connectionJson) {
    PrestoConnectionParam connectionParams = (PrestoConnectionParam) createConnectionParams(connectionJson);

    String[] hostSeperator = connectionParams.getAddress().split(Constants.DOUBLE_SLASH);
    String[] hostPortArray = hostSeperator[hostSeperator.length - 1].split(Constants.COMMA);

    PrestoDataSourceParamDTO
        prestoDatasourceParamDTO = new PrestoDataSourceParamDTO();
    prestoDatasourceParamDTO.setPort(Integer.parseInt(hostPortArray[0].split(Constants.COLON)[1]));
    prestoDatasourceParamDTO.setHost(hostPortArray[0].split(Constants.COLON)[0]);
    prestoDatasourceParamDTO.setDatabase(connectionParams.getDatabase());
    prestoDatasourceParamDTO.setUserName(connectionParams.getUser());
    prestoDatasourceParamDTO.setOther(parseOther(connectionParams.getOther()));

    return prestoDatasourceParamDTO;
  }

  @Override
  public BaseConnectionParam createConnectionParams(BaseDataSourceParamDTO datasourceParam) {
    PrestoDataSourceParamDTO prestoParam = (PrestoDataSourceParamDTO) datasourceParam;
    String address =
        String.format("%s%s:%s", DataSourceConstants.JDBC_PRESTO, prestoParam.getHost(), prestoParam.getPort());
    String jdbcUrl = address + "/" + prestoParam.getDatabase();

    PrestoConnectionParam prestoConnectionParam = new PrestoConnectionParam();
    prestoConnectionParam.setUser(prestoParam.getUserName());
    prestoConnectionParam.setPassword(PasswordUtils.encodePassword(prestoParam.getPassword()));
    prestoConnectionParam.setOther(transformOther(prestoParam.getOther()));
    prestoConnectionParam.setAddress(address);
    prestoConnectionParam.setJdbcUrl(jdbcUrl);
    prestoConnectionParam.setDatabase(prestoParam.getDatabase());
    prestoConnectionParam.setDriverClassName(getDatasourceDriver());
    prestoConnectionParam.setValidationQuery(getValidationQuery());
    prestoConnectionParam.setProps(prestoParam.getOther());

    return prestoConnectionParam;
  }

  @Override
  public ConnectionParam createConnectionParams(String connectionJson) {
    return JSONUtils.parseObject(connectionJson, PrestoConnectionParam.class);
  }

  @Override
  public String getDatasourceDriver() {
    return DataSourceConstants.COM_PRESTO_JDBC_DRIVER;
  }

  @Override
  public String getValidationQuery() {
    return DataSourceConstants.PRESTO_VALIDATION_QUERY;
  }

  @Override
  public String getJdbcUrl(ConnectionParam connectionParam) {
    PrestoConnectionParam prestoConnectionParam = (PrestoConnectionParam) connectionParam;
    if (!StringUtils.isEmpty(prestoConnectionParam.getOther())) {
      return String.format("%s?%s", prestoConnectionParam.getJdbcUrl(), prestoConnectionParam.getOther());
    }
    return prestoConnectionParam.getJdbcUrl();
  }

  @Override
  public Connection getConnection(ConnectionParam connectionParam) throws ClassNotFoundException, SQLException {
    PrestoConnectionParam prestoConnectionParam = (PrestoConnectionParam) connectionParam;
    Class.forName(getDatasourceDriver());
    return DriverManager.getConnection(getJdbcUrl(connectionParam),
        prestoConnectionParam.getUser(), PasswordUtils.decodePassword(prestoConnectionParam.getPassword()));
  }

  @Override
  public DbType getDbType() {
    return DbType.PRESTO;
  }

  @Override
  public DataSourceProcessor create() {
    return new PrestoDataSourceProcessor();
  }

  private String transformOther(Map<String, String> otherMap) {
    if (MapUtils.isNotEmpty(otherMap)) {
      List<String> list = new ArrayList<>();
      otherMap.forEach((key, value) -> list.add(String.format("%s=%s", key, value)));
      return String.join("&", list);
    }
    return null;
  }

  private Map<String, String> parseOther(String other) {
    if (StringUtils.isEmpty(other)) {
      return null;
    }
    Map<String, String> otherMap = new LinkedHashMap<>();
    String[] configs = other.split("&");
    for (String config : configs) {
      otherMap.put(config.split("=")[0], config.split("=")[1]);
    }
    return otherMap;
  }
}
